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GATE ECE 1991 | Question-21

In figure, both transistors are identical and have a high value of beta. Take the dc base-emitter voltage drop as $0.7$ volt and $\mathrm{KT} / \mathrm{q}=25 \mathrm{mV}$. The small signal low frequency voltage gain $\left(V_o / V_i\right)$ is equal to__________.

 

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